US Births in 1969 - 1988

Description

A day by day record of the number of births in each US State.

Usage

data(Birthdays)

Format

A data frame with 374221 observations on the following variables.

• state state where child was born

• year year (1969-1988)

• month month (1-12)

• day day of month

• date date as a date object

• births number of births

Examples

data(Birthdays)
if (require(mosaic)) {
  MI <- Birthdays %>% filter(state == "MI")
  gf_point(births ~ date, Birthdays, data = MI) 
  gf_line(births ~ date, Birthdays, data = MI, color = ~ wday)
  gf_line(births ~ date, 
    data = Birthdays %>% group_by(date) %>% summarise(births = sum(births)))
  }